code: def test_length_uea_dataset_list():
      """Test that the length of the list is equal to the number of datasets."""
      assert len(uea_dataset_list()) == 30
  
file_path: pyts/pyts/datasets/tests/test_uea.py
imports: import pytest
  import re
  from pyts.datasets import fetch_uea_dataset, uea_dataset_info, uea_dataset_list
  from pyts.datasets.uea import _correct_uea_name_download
label_desc: Use image node_id 4 for calling a global function with example usage: test_length_uea_dataset_list() without return types